Method of manufacturing light guide plate, light guide plate, backlight unit with the light guide plate and display apparatus having the same

US20080310184A1Active Publication Date: 2008-12-18CITIZEN ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
CITIZEN ELECTRONICS CO LTD
Publication Date
2008-12-18

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Abstract

A method of producing an edge-light type light guide plate having a light exiting surface and a light reflecting surface having light reflective dots formed thereon in a scattered fashion. The method includes (a) producing a first prototype of the light guide plate having primary dots formed on the light reflecting surface, (b) examining optical characteristics of the first prototype relating to light exiting from the light exiting surface thereof, and (c) producing a second prototype of the lightguide plate when the examined first prototype exhibits unsatisfactory optical characteristics. The second prototype has primary dots that are the same as the primary dots of the first prototype in size and distribution, and secondary dots arranged between the primary dots in at least part of the light reflecting surface. The steps (b) and (c) are repeated until a prototype is produced which exhibits satisfactory optical characteristics.
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Description

[0001] This application claims priority under 35 U.S.C. §119 to Japanese Patent application No. JP2007-158073 filed on Jun. 14, 2007, the entire contents of which are hereby incorporated by reference.TECHNICAL FIELD

[0002] The present invention relates to light guide plates for use in display apparatus and the like.RELATED ART

[0003] Liquid crystal display apparatus have been widely used in mobile phones, personal digital assistants (PDAs), automatic teller machines (ATMs), displays of personal computers, etc. These liquid crystal display apparatus employ a backlight unit that applies light to a liquid crystal display panel from the back thereof to enhance a luminance of the display screen.

[0004] The backlight unit uses a light guide plate that receives light from a light source such as LEDs (light-emitting diodes) and that applies the light toward the entire back surface of the liquid crystal display panel. This type of light guide plate is demanded to apply light to the liquid crystal d...

Claims

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